1st gen 1990 Cummins
 

250,000 miler. Still get 20-22 mpg. Pulling my 22' travel trailer from the 70's, it drops to 14-16 mpg.

1993 W250 regular cab and bed with the 360 (5.9L) and it gets around 10 mpg.

1977 W200 (M880) with 318 LA / 727 (full time 4WD). Holley 600 (4160), Edelbrock Performer intake manifold, Summit 6901 camshaft, Longtube Headers. 10 - 11 MPG highway @ 2,800 RPM w/ 4.10 gears & 33" Yokohama Geolandar M/T's. Around town I imagine anywhere between 8 - 12.

88 Longbed 2WD. Wood bed made out of pressure treated wood from HD. Weighs more than stock bed. 32” Toyos. 3.9l with smog pump deleted, straight piped and a bunch of vacuum lines snapped. Getting 15-18mpg currently.

8-10 in the city havnt really taken it on the freeway 10-11 driving back roads which is what I mostly drive
1986 360 single cab long bed
basically stock motor with custom 4in exhaust

any suggestions for better mpg?

14.5, 14.9, 13.75, 13.9, 14.5, 13.8, 16.4, 14, 15.2, 15.8, 14.5, 15.9, the past couple of times I've filled up and checked the milage.

1989 D-150 3speed automatic, 318, TBI, LWB, 139+ thousand miles. All smog, EGR and such still hooked up and operational. 15" tires as stock and as original as it was when new, as far as I can tell. I believe I am the 3rd owner. It was originally bought second hand from a dealership and used to tow a camper. It still has the brake assist assembly hooked up.

1993 Dodge W150 Clubcab w/5.9l 360 Magnum and NV4500 5-speed Manual (Aprox. 160k miles)

I get on average a combined of 10.5-11 mpg. This is an improvement of about a 1-1.5 mpg from when I first got the truck. (Downhill on the interstate I get around 14mpg) One of the things I did to increase mileage was simply changing my tires to a "lighter ply". Even after going up a size in diameter, it increased my milage.

Nice, and good to know about tire size!

When I made my original post, I had passenger car tires on the truck. A long wheel base truck which usually runs without anything in the bed tends to slip on the gravel driveways I encounter, mine included.

I have since replaced those tires, when they wore out, with a set slightly more aggressive. My milage now is roughly 15.3, 13, 14.4, 17.2, 13.6, 15.2, 12.4, 12.9.